Huawei SUN2000-29.9KTL - Page 94

SUN2000-(29.9KTL, 33KTL-A, 36KTL, 42KTL)
User Manual
8 Maintenance
Issue 11 (2019-06-08)
Copyright © Huawei Technologies Co., Ltd.
87
Alarm ID
Alarm
Name
Alarm
Severity
Possible Cause
Suggestion
106–113
Abnormal
String 1–8
Warning
Cause ID = 1

The PV string is shielded
from sunlight for a long
time.

The PV string deteriorates
or is damaged.
1. Check whether the PV string
current is obviously lower than
the currents of other PV strings.
2. If yes, check whether the PV
string is shielded from sunlight.
3. If the PV string is clean and not
shielded from sunlight, check
whether any PV module is faulty.
120–127
String 1–8
Reversed
Cause ID
= 1:
Major
Cause ID
= 2:
Warning

Cause ID = 1
The PV string is reversely
connected.

Cause ID = 2
Only a few PV modules are
connected in series to the
PV string, and therefore the
end voltage is lower than
that of other PV strings.

Cause ID = 1
Check whether the PV string is
reversely connected to the
SUN2000. If yes, wait until the
solar irradiance declines at night
and the PV string current reduces
to below 0.5 A. Then, turn off the
two DC switches and correct the
PV string connection.

Cause ID = 2
Check whether the number of PV
modules connected in series to
the SUN2000 is small. If yes,
increase the number.